Improved tool foe sheaelng bolts



uitshftete @frn Annan-ALEXANDER, Yor 'PiTTsBURaPENNSYLVANIA, Assieme 'ro ALEX'- ANDER B'oLr-MANUFACTUMNG cour-Nn or sans PLAGE,

Leim-s Param No. 76,035, afee Mwah 31,1868.

IMPROVED Toot ron SHEARING BOL'TS.

'J0 ALL WH-OM I-T 'MAY CONCERN': l'

Be it known that I, ABRAM ALEXANDER, ofl the city of Pittsburg, in the county of Allegheny, and State of Pennsylvania, have invented certain Improvements in Shears for Cutting Round Iron and I do hereby declare that the following is a fulland exact description thereof, which will enable others skilled in the art to make and use the` same, reference being had tofthegaccompanying drawings, in which- Figure 1 is a. sectional Aelevation through a: a: of my improved round-iron shears.

' Figure 2 is aA top view or' plan ofthe same. v A v Figure -3 is a front view of the dies used in my' improvedshears, and a cross-section ziz of the round iron. Figure l is a cross-section of the dies through Q Q. I Figure, a longitudinal section through Y Y; and

' Figure 6 is ahorizontalvsection through Q Q, showing' how the bolt-blank is brolien off from the bar by the shears. Y

' 'This invention lrelates to the construction and use of ashea-rs forv ciltting off bolt-blanks from round iron,

by rolling .the same between the sharp 'edgesof dies moving in opposite directions one from the other, and in l a plane at right angles with the length of the round iron, as fully described further. i

v Y Description.

A is a strong bed-plate, having two side-pieces, A and A', capped by the piece'B, which is strongly bolted," to the two sides'of the machine'. 'C is a shaft, mounted in proper journals c and e in the sides A A', and receiving its rotary motion from' any suitable gearings-in ni'y drawings,'through the pulleyc. D is a crank, 4made fast on the shaft C. E is a pitman, connecting the crank, D, to the vibratinglarm or `beam F. The beam F isv `fast to an oscillating-shaft, G, to which are also fastened the two fingers or cogs H and H', which are yproperly tted in suitable notches Il inthe barsK and K. The bars K and K are tted in between the two pieces A and A, so as toslide freely in a longitudinal direction, and, by proper guides and slides, are made to work true, and keep moving in a plane parallel to the longitudinal axis ofthe machine.

In order to diminish the friction, the rollers -L L L, die., may be employed; but, for smell'machines, the

- pieces K and .Kean be made to slide. diret-lyy on slides fast t6 the piece A and B. The two iingersH H 'being fitted, as alreadyidescribed, in notches of the pieces K and K, ,when the arm or beam F causes the shaft Gto' rock' backward' and forward, the two pieces, K and K, will receive a sliding motion in opposite direction one from the other, as indicated by the arrows`in fig.' 1.

M M" are st'eel dies, having the shape indicated clearly by theiigs. 3, 4, and 5 in my drawings;r bot-h dies, M and M', having a longitudinal raised edge or ribs, m m',- sloping down at one end. These ribs are sharp,

r and their sides o r slopes are gradually rounding down' to the {latsurface ofthe dies Mr and M', as seen in the section, tig. 4f.4 The die M has, besides, a projection, V, having' va vertical edge in `'er about in a line with' the raised ribs m m', (see igsfl, 3, -5, and 6,) The dies vhd and M are fastened to the sliding-pieces K- aud K', in such a manner as to be one over the other, with their-raised ribs mm as near as possible opposite each other 'on the line Y Y, fig. The thickness of the dies M and M is varied, or is raised by Ltillers, to suit the size of. the round ironwhieh isitov'be cut by the shears, so that the said round iron will enterv freely between the dies,when they lie as represented in iig. 3, andthat, when the dies are moved in the direction of the arrows, (fig. 3,) thelat surfacesof the dies M land M will fit tight, slightly crushing the iron, so as to roll it perfectly round between the lat surfaces of the said dies, in the same time that the raised sharp ribs m and m will,'by penetrating in the iron, form an indenture or groove all around the iron, und reduce its strength,` as seeuby P. The part V ofthe die M now comes in contactowith the round iron bar, (see'g. 6,) and,l as it continues te more forward in the direction of the small arrow, (tig. 6,) and that the iron bar comes to a bearing on thestationary i guidesO and O, the bar gives way at the point P, which has'be'en weakened by'thegdies,as stated above.4

N 'is a guide,.aga inst which the end of the'rod of round A iron is pushed, and is madeadjustable inits dis L v tance from the dies'vMA and M', soas to determine the length of the boltblanlrs vorfpins toibeeut onthe shears.

Operation.

The shears being put in motion, that. is, the two'pieces K and K being made to slide onc on the other,A as explained in the description, the workman wntchesthe moment when the dies'are in lthe position represented 'iu fig. 3'. The bur of round iron to be'eut is introduced briskly inthe hole of the frame-piece A at T, and

pushed in until it butts against the guide N, when the dies, by moving in the direction of 'the arrows, figs. 3 and 5, out of a. blank, und, as' soon ns the dies are uga-in in the position of tig. 3, the ber is again pushed'forwurd, so asto cut a. new blank, so that, at each 'revolution of t-lliesha't't C, one bolt-blank is cut oFf from' the bur, :rnd the endsof the said', bolt-blanks are rounded and smoothed in the proper place for cutting the thread of the bolt from ,the action of'the dies M and M', as already described. v i

l Claims.

1. AIn tools-for' cutting round ironbars, the combination offthe' crunk D, pitmen E, lever F, cogs H with the pieces K K', dies M and M', and suitable frame A ATAAB, arranged substantially in the manner, and operating as set forth. v r

2. The sliding pieces Knnd K, carrying sharp-edged steel dies, constructed as described, for indenting or grooving round iron rods for cutting the same, Loliarranged and operetingsubstan'tiully `ats specified.

3. The dies M and M-rhavn'g shurp'ridgesvm m', and the projection V, when used for grooving and breaking round iron, in the menu/'er substantinllyns described. I

, A. ALEXANDER. [L 5.,] Witnesses:

JOHN Mormon',

SAMUEL MeEnnANr,

Jos. SNOWDEN. 

